diff --git a/app/src/main/java/com/wireguard/android/backend/Backend.java b/app/src/main/java/com/wireguard/android/backend/Backend.java
index 64bb3d0..fe4b0bd 100644
--- a/app/src/main/java/com/wireguard/android/backend/Backend.java
+++ b/app/src/main/java/com/wireguard/android/backend/Backend.java
@@ -57,7 +57,7 @@ public interface Backend {
      *
      * @return Type name
      */
-    String getTypeName();
+    String getTypePrettyName();
 
     /**
      * Determine version of underlying backend.
diff --git a/app/src/main/java/com/wireguard/android/backend/GoBackend.java b/app/src/main/java/com/wireguard/android/backend/GoBackend.java
index 97cf0f8..e9ac079 100644
--- a/app/src/main/java/com/wireguard/android/backend/GoBackend.java
+++ b/app/src/main/java/com/wireguard/android/backend/GoBackend.java
@@ -14,6 +14,7 @@ import android.support.v4.util.ArraySet;
 import android.util.Log;
 
 import com.wireguard.android.Application;
+import com.wireguard.android.R;
 import com.wireguard.android.activity.MainActivity;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.model.Tunnel.State;
@@ -26,6 +27,7 @@ import com.wireguard.config.Peer;
 
 import java.net.InetAddress;
 import java.util.Collections;
+import java.util.Locale;
 import java.util.Objects;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
@@ -93,8 +95,8 @@ public final class GoBackend implements Backend {
     }
 
     @Override
-    public String getTypeName() {
-        return "Go userspace";
+    public String getTypePrettyName() {
+        return context.getResources().getString(R.string.type_name_go_userspace);
     }
 
     @Override
@@ -110,7 +112,7 @@ public final class GoBackend implements Backend {
         if (state == originalState)
             return originalState;
         if (state == State.UP && currentTunnel != null)
-            throw new IllegalStateException("Only one userspace tunnel can run at a time");
+            throw new IllegalStateException(context.getResources().getString(R.string.multiple_tunnels_error));
         Log.d(TAG, "Changing tunnel " + tunnel.getName() + " to state " + state);
         setStateInternal(tunnel, tunnel.getConfig(), state);
         return getState(tunnel);
@@ -122,10 +124,10 @@ public final class GoBackend implements Backend {
         if (state == State.UP) {
             Log.i(TAG, "Bringing tunnel up");
 
-            Objects.requireNonNull(config, "Trying to bring up a tunnel with no config");
+            Objects.requireNonNull(config, context.getResources().getString(R.string.no_config_error));
 
             if (VpnService.prepare(context) != null)
-                throw new Exception("VPN service not authorized by user");
+                throw new Exception(context.getResources().getString(R.string.vpn_not_authed_error));
 
             final VpnService service;
             if (!vpnService.isDone())
@@ -134,7 +136,7 @@ public final class GoBackend implements Backend {
             try {
                 service = vpnService.get(2, TimeUnit.SECONDS);
             } catch (final TimeoutException e) {
-                throw new Exception("Unable to start Android VPN service", e);
+                throw new Exception(context.getResources().getString(R.string.vpn_start_error), e);
             }
 
             if (currentTunnelHandle != -1) {
@@ -172,12 +174,12 @@ public final class GoBackend implements Backend {
             builder.setBlocking(true);
             try (final ParcelFileDescriptor tun = builder.establish()) {
                 if (tun == null)
-                    throw new Exception("Unable to create tun device");
+                    throw new Exception(context.getResources().getString(R.string.tun_create_error));
                 Log.d(TAG, "Go backend v" + wgVersion());
                 currentTunnelHandle = wgTurnOn(tunnel.getName(), tun.detachFd(), goConfig);
             }
             if (currentTunnelHandle < 0)
-                throw new Exception("Unable to turn tunnel on (wgTurnOn return " + currentTunnelHandle + ')');
+                throw new Exception(String.format(Locale.getDefault(), context.getResources().getString(R.string.tunnel_on_error), currentTunnelHandle));
 
             currentTunnel = tunnel;
 
diff --git a/app/src/main/java/com/wireguard/android/backend/WgQuickBackend.java b/app/src/main/java/com/wireguard/android/backend/WgQuickBackend.java
index b69845b..7535b95 100644
--- a/app/src/main/java/com/wireguard/android/backend/WgQuickBackend.java
+++ b/app/src/main/java/com/wireguard/android/backend/WgQuickBackend.java
@@ -10,6 +10,7 @@ import android.support.annotation.Nullable;
 import android.util.Log;
 
 import com.wireguard.android.Application;
+import com.wireguard.android.R;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.model.Tunnel.State;
 import com.wireguard.android.model.Tunnel.Statistics;
@@ -36,9 +37,11 @@ public final class WgQuickBackend implements Backend {
     private static final String TAG = "WireGuard/" + WgQuickBackend.class.getSimpleName();
 
     private final File localTemporaryDir;
+    private final Context context;
 
     public WgQuickBackend(final Context context) {
         localTemporaryDir = new File(context.getCacheDir(), "tmp");
+        this.context = context;
     }
 
     @Override
@@ -84,8 +87,8 @@ public final class WgQuickBackend implements Backend {
     }
 
     @Override
-    public String getTypeName() {
-        return "Kernel module";
+    public String getTypePrettyName() {
+        return context.getResources().getString(R.string.type_name_kernel_module);
     }
 
     @Override
@@ -93,7 +96,7 @@ public final class WgQuickBackend implements Backend {
         final List<String> output = new ArrayList<>();
         if (Application.getRootShell()
                 .run(output, "cat /sys/module/wireguard/version") != 0 || output.isEmpty())
-            throw new Exception("Unable to determine kernel module version");
+            throw new Exception(context.getResources().getString(R.string.module_version_error));
         return output.get(0);
     }
 
@@ -125,6 +128,6 @@ public final class WgQuickBackend implements Backend {
         // noinspection ResultOfMethodCallIgnored
         tempFile.delete();
         if (result != 0)
-            throw new Exception("Unable to configure tunnel (wg-quick returned " + result + ')');
+            throw new Exception(context.getResources().getString(R.string.tunnel_config_error));
     }
 }
diff --git a/app/src/main/java/com/wireguard/android/configStore/FileConfigStore.java b/app/src/main/java/com/wireguard/android/configStore/FileConfigStore.java
index 654cb48..184dd6d 100644
--- a/app/src/main/java/com/wireguard/android/configStore/FileConfigStore.java
+++ b/app/src/main/java/com/wireguard/android/configStore/FileConfigStore.java
@@ -8,6 +8,7 @@ package com.wireguard.android.configStore;
 import android.content.Context;
 import android.util.Log;
 
+import com.wireguard.android.R;
 import com.wireguard.config.Config;
 import com.wireguard.config.ParseException;
 
@@ -17,6 +18,7 @@ import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.util.Locale;
 import java.util.Set;
 
 import java9.util.stream.Collectors;
@@ -40,7 +42,8 @@ public final class FileConfigStore implements ConfigStore {
         Log.d(TAG, "Creating configuration for tunnel " + name);
         final File file = fileFor(name);
         if (!file.createNewFile())
-            throw new IOException("Configuration file " + file.getName() + " already exists");
+            throw new IOException(String.format(Locale.getDefault(),
+                    context.getResources().getString(R.string.config_file_exists_error), file.getName()));
         try (final FileOutputStream stream = new FileOutputStream(file, false)) {
             stream.write(config.toWgQuickString().getBytes(StandardCharsets.UTF_8));
         }
@@ -52,7 +55,8 @@ public final class FileConfigStore implements ConfigStore {
         Log.d(TAG, "Deleting configuration for tunnel " + name);
         final File file = fileFor(name);
         if (!file.delete())
-            throw new IOException("Cannot delete configuration file " + file.getName());
+            throw new IOException(String.format(Locale.getDefault(),
+                    context.getResources().getString(R.string.config_delete_error), file.getName()));
     }
 
     @Override
@@ -80,11 +84,13 @@ public final class FileConfigStore implements ConfigStore {
         final File file = fileFor(name);
         final File replacementFile = fileFor(replacement);
         if (!replacementFile.createNewFile())
-            throw new IOException("Configuration for " + replacement + " already exists");
+            throw new IOException(String.format(Locale.getDefault(),
+                    context.getResources().getString(R.string.config_exists_error), replacement));
         if (!file.renameTo(replacementFile)) {
             if (!replacementFile.delete())
                 Log.w(TAG, "Couldn't delete marker file for new name " + replacement);
-            throw new IOException("Cannot rename configuration file " + file.getName());
+            throw new IOException(String.format(Locale.getDefault(),
+                    context.getResources().getString(R.string.config_rename_error), file.getName()));
         }
     }
 
@@ -93,7 +99,8 @@ public final class FileConfigStore implements ConfigStore {
         Log.d(TAG, "Saving configuration for tunnel " + name);
         final File file = fileFor(name);
         if (!file.isFile())
-            throw new FileNotFoundException("Configuration file " + file.getName() + " not found");
+            throw new FileNotFoundException(String.format(Locale.getDefault(),
+                    context.getResources().getString(R.string.config_not_found_error), file.getName()));
         try (final FileOutputStream stream = new FileOutputStream(file, false)) {
             stream.write(config.toWgQuickString().getBytes(StandardCharsets.UTF_8));
         }
diff --git a/app/src/main/java/com/wireguard/android/fragment/ConfigNamingDialogFragment.java b/app/src/main/java/com/wireguard/android/fragment/ConfigNamingDialogFragment.java
index 0931868..878f933 100644
--- a/app/src/main/java/com/wireguard/android/fragment/ConfigNamingDialogFragment.java
+++ b/app/src/main/java/com/wireguard/android/fragment/ConfigNamingDialogFragment.java
@@ -24,6 +24,7 @@ import com.wireguard.config.ParseException;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.util.Locale;
 import java.util.Objects;
 
 public class ConfigNamingDialogFragment extends DialogFragment {
@@ -68,7 +69,8 @@ public class ConfigNamingDialogFragment extends DialogFragment {
         try {
             config = Config.parse(new ByteArrayInputStream(getArguments().getString(KEY_CONFIG_TEXT).getBytes(StandardCharsets.UTF_8)));
         } catch (final IOException | ParseException exception) {
-            throw new RuntimeException("Invalid config passed to " + getClass().getSimpleName(), exception);
+            throw new RuntimeException(String.format(Locale.getDefault(),
+                    getResources().getString(R.string.invalid_config_error), getClass().getSimpleName()), exception);
         }
     }
 
diff --git a/app/src/main/java/com/wireguard/android/fragment/TunnelListFragment.java b/app/src/main/java/com/wireguard/android/fragment/TunnelListFragment.java
index 5140574..85d66ba 100644
--- a/app/src/main/java/com/wireguard/android/fragment/TunnelListFragment.java
+++ b/app/src/main/java/com/wireguard/android/fragment/TunnelListFragment.java
@@ -115,14 +115,15 @@ public class TunnelListFragment extends BaseFragment {
             int idx = name.lastIndexOf('/');
             if (idx >= 0) {
                 if (idx >= name.length() - 1)
-                    throw new IllegalArgumentException("Illegal file name: " + name);
+                    throw new IllegalArgumentException(String.format(Locale.getDefault(),
+                            getResources().getString(R.string.illegal_filename_error), name));
                 name = name.substring(idx + 1);
             }
             boolean isZip = name.toLowerCase(Locale.ENGLISH).endsWith(".zip");
             if (name.toLowerCase(Locale.ENGLISH).endsWith(".conf"))
                 name = name.substring(0, name.length() - ".conf".length());
             else if (!isZip)
-                throw new IllegalArgumentException("File must be .conf or .zip");
+                throw new IllegalArgumentException(getResources().getString(R.string.bad_extension_error));
 
             if (isZip) {
                 try (ZipInputStream zip = new ZipInputStream(contentResolver.openInputStream(uri));
@@ -161,7 +162,7 @@ public class TunnelListFragment extends BaseFragment {
                 if (throwables.size() == 1)
                     throw throwables.get(0);
                 else if (throwables.isEmpty())
-                    throw new IllegalArgumentException("No configurations found");
+                    throw new IllegalArgumentException(getResources().getString(R.string.no_configs_error));
             }
 
             return CompletableFuture.allOf(futureTunnels.toArray(new CompletableFuture[futureTunnels.size()]));
diff --git a/app/src/main/java/com/wireguard/android/preference/LogExporterPreference.java b/app/src/main/java/com/wireguard/android/preference/LogExporterPreference.java
index a7f4950..5babb9a 100644
--- a/app/src/main/java/com/wireguard/android/preference/LogExporterPreference.java
+++ b/app/src/main/java/com/wireguard/android/preference/LogExporterPreference.java
@@ -44,7 +44,8 @@ public class LogExporterPreference extends Preference {
             final File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
             final File file = new File(path, "wireguard-log.txt");
             if (!path.isDirectory() && !path.mkdirs())
-                throw new IOException("Cannot create output directory");
+                throw new IOException(
+                        getContext().getResources().getString(R.string.create_output_dir_error));
 
             /* We would like to simply run `builder.redirectOutput(file);`, but this is API 26.
              * Instead we have to do this dance, since logcat appends.
diff --git a/app/src/main/java/com/wireguard/android/preference/VersionPreference.java b/app/src/main/java/com/wireguard/android/preference/VersionPreference.java
index ec02eb0..2273d6d 100644
--- a/app/src/main/java/com/wireguard/android/preference/VersionPreference.java
+++ b/app/src/main/java/com/wireguard/android/preference/VersionPreference.java
@@ -26,11 +26,11 @@ public class VersionPreference extends Preference {
         super(context, attrs);
 
         Application.getBackendAsync().thenAccept(backend -> {
-            versionSummary = getContext().getString(R.string.version_summary_checking, backend.getTypeName().toLowerCase(Locale.ENGLISH));
+            versionSummary = getContext().getString(R.string.version_summary_checking, backend.getTypePrettyName().toLowerCase(Locale.ENGLISH));
             Application.getAsyncWorker().supplyAsync(backend::getVersion).whenComplete((version, exception) -> {
                 versionSummary = exception == null
-                        ? getContext().getString(R.string.version_summary, backend.getTypeName(), version)
-                        : getContext().getString(R.string.version_summary_unknown, backend.getTypeName().toLowerCase(Locale.ENGLISH));
+                        ? getContext().getString(R.string.version_summary, backend.getTypePrettyName(), version)
+                        : getContext().getString(R.string.version_summary_unknown, backend.getTypePrettyName().toLowerCase(Locale.ENGLISH));
                 notifyChanged();
             });
         });
diff --git a/app/src/main/java/com/wireguard/android/preference/ZipExporterPreference.java b/app/src/main/java/com/wireguard/android/preference/ZipExporterPreference.java
index 5e33ba1..9aa48d0 100644
--- a/app/src/main/java/com/wireguard/android/preference/ZipExporterPreference.java
+++ b/app/src/main/java/com/wireguard/android/preference/ZipExporterPreference.java
@@ -55,7 +55,8 @@ public class ZipExporterPreference extends Preference {
         for (final Tunnel tunnel : tunnels)
             futureConfigs.add(tunnel.getConfigAsync().toCompletableFuture());
         if (futureConfigs.isEmpty()) {
-            exportZipComplete(null, new IllegalArgumentException("No tunnels exist"));
+            exportZipComplete(null, new IllegalArgumentException(
+                    getContext().getResources().getString(R.string.no_tunnels_error)));
             return;
         }
         CompletableFuture.allOf(futureConfigs.toArray(new CompletableFuture[futureConfigs.size()]))
@@ -65,7 +66,8 @@ public class ZipExporterPreference extends Preference {
                     final File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
                     final File file = new File(path, "wireguard-export.zip");
                     if (!path.isDirectory() && !path.mkdirs())
-                        throw new IOException("Cannot create output directory");
+                        throw new IOException(
+                                getContext().getResources().getString(R.string.create_output_dir_error));
                     try (ZipOutputStream zip = new ZipOutputStream(new FileOutputStream(file))) {
                         for (int i = 0; i < futureConfigs.size(); ++i) {
                             zip.putNextEntry(new ZipEntry(tunnels.get(i).getName() + ".conf"));
diff --git a/app/src/main/java/com/wireguard/android/util/RootShell.java b/app/src/main/java/com/wireguard/android/util/RootShell.java
index 00d54ab..0e04185 100644
--- a/app/src/main/java/com/wireguard/android/util/RootShell.java
+++ b/app/src/main/java/com/wireguard/android/util/RootShell.java
@@ -20,6 +20,7 @@ import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
 import java.nio.charset.StandardCharsets;
 import java.util.Collection;
+import java.util.Locale;
 import java.util.UUID;
 
 /**
@@ -30,6 +31,7 @@ public class RootShell {
     private static final String SU = "su";
     private static final String TAG = "WireGuard/" + RootShell.class.getSimpleName();
 
+    private final Context context;
     private final String deviceNotRootedMessage;
     private final File localBinaryDir;
     private final File localTemporaryDir;
@@ -47,6 +49,7 @@ public class RootShell {
         localTemporaryDir = new File(cacheDir, "tmp");
         preamble = String.format("export CALLING_PACKAGE=%s PATH=\"%s:$PATH\" TMPDIR='%s'; id -u\n",
                 BuildConfig.APPLICATION_ID, localBinaryDir, localTemporaryDir);
+        this.context = context;
     }
 
     private static boolean isExecutableInPath(final String name) {
@@ -121,9 +124,10 @@ public class RootShell {
                 }
             }
             if (markersSeen != 4)
-                throw new IOException("Expected 4 markers, received " + markersSeen);
+                throw new IOException(String.format(Locale.getDefault(),
+                        context.getResources().getString(R.string.marker_count_error), markersSeen));
             if (errnoStdout != errnoStderr)
-                throw new IOException("Unable to read exit status");
+                throw new IOException(context.getResources().getString(R.string.exit_status_read_error));
             Log.v(TAG, "exit: " + errnoStdout);
             return errnoStdout;
         }
@@ -136,9 +140,9 @@ public class RootShell {
             if (isRunning())
                 return;
             if (!localBinaryDir.isDirectory() && !localBinaryDir.mkdirs())
-                throw new FileNotFoundException("Could not create local binary directory");
+                throw new FileNotFoundException(context.getResources().getString(R.string.create_bin_dir_error));
             if (!localTemporaryDir.isDirectory() && !localTemporaryDir.mkdirs())
-                throw new FileNotFoundException("Could not create local temporary directory");
+                throw new FileNotFoundException(context.getResources().getString(R.string.create_temp_dir_error));
             try {
                 final ProcessBuilder builder = new ProcessBuilder().command(SU);
                 builder.environment().put("LC_ALL", "C");
@@ -168,7 +172,8 @@ public class RootShell {
                         if (line.contains("Permission denied"))
                             throw new NoRootException(deviceNotRootedMessage);
                     }
-                    throw new IOException("Shell failed to start: " + process.exitValue());
+                    throw new IOException(String.format(Locale.getDefault(),
+                            context.getResources().getString(R.string.shell_start_error), process.exitValue()));
                 }
             } catch (final IOException | NoRootException e) {
                 stop();
diff --git a/app/src/main/java/com/wireguard/android/util/ToolsInstaller.java b/app/src/main/java/com/wireguard/android/util/ToolsInstaller.java
index 143a872..ebdfd3d 100644
--- a/app/src/main/java/com/wireguard/android/util/ToolsInstaller.java
+++ b/app/src/main/java/com/wireguard/android/util/ToolsInstaller.java
@@ -12,6 +12,7 @@ import android.util.Log;
 
 import com.wireguard.android.Application;
 import com.wireguard.android.BuildConfig;
+import com.wireguard.android.R;
 import com.wireguard.android.util.RootShell.NoRootException;
 
 import java.io.File;
@@ -41,6 +42,7 @@ public final class ToolsInstaller {
     @Nullable private static final File INSTALL_DIR = getInstallDir();
     private static final String TAG = "WireGuard/" + ToolsInstaller.class.getSimpleName();
 
+    private final Context context;
     private final File localBinaryDir;
     private final Object lock = new Object();
     private final File nativeLibraryDir;
@@ -50,6 +52,7 @@ public final class ToolsInstaller {
     public ToolsInstaller(final Context context) {
         localBinaryDir = new File(context.getCacheDir(), "bin");
         nativeLibraryDir = new File(context.getApplicationInfo().nativeLibraryDir);
+        this.context = context;
     }
 
     @Nullable
@@ -102,7 +105,8 @@ public final class ToolsInstaller {
                 }
             }
             if (!areToolsAvailable)
-                throw new FileNotFoundException("Required tools unavailable");
+                throw new FileNotFoundException(
+                        context.getResources().getString(R.string.tools_unavailable_error));
         }
     }
 
diff --git a/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java b/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java
index 7f5b67e..ee99c98 100644
--- a/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java
+++ b/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java
@@ -218,7 +218,7 @@ public class FloatingActionsMenu extends ViewGroup {
         attr.recycle();
 
         if (mLabelsStyle != 0 && expandsHorizontally()) {
-            throw new IllegalStateException("Action labels in horizontal expand orientation is not supported.");
+            throw new IllegalStateException(getResources().getString(R.string.horizontal_expand_error));
         }
 
         createAddButton(context);
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6202ee7..548f607 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -114,4 +114,34 @@
     <string name="zip_export_error">Unable to export tunnels: %s</string>
     <string name="zip_export_success">Saved to %s</string>
     <string name="zip_export_summary">Zip file will be saved to downloads folder</string>
+
+
+    <string name="vpn_not_authed_error">VPN service not authorized by user</string>
+    <string name="vpn_start_error">Unable to start Android VPN service</string>
+    <string name="no_config_error">Trying to bring up a tunnel with no config</string>
+    <string name="tun_create_error">Unable to create tun device</string>
+    <string name="tunnel_on_error">Unable to turn tunnel on (wgTurnOn returned %i)</string>
+    <string name="tunnel_config_error">Unable to configure tunnel (wg-quick returned %i)</string>
+    <string name="module_version_error">Unable to determine kernel module version</string>
+    <string name="config_file_exists_error">Configuration file %s already exists</string>
+    <string name="config_exists_error">Configuration for %s already exists</string>
+    <string name="config_delete_error">Cannot delete configuration file %s</string>
+    <string name="config_rename_error">Cannot rename configuration file %s</string>
+    <string name="config_not_found_error">Configuration file %s not found</string>
+    <string name="no_tunnels_error">No tunnels exist</string>
+    <string name="create_output_dir_error">Cannot create output directory</string>
+    <string name="illegal_filename_error">Illegal file name %s</string>
+    <string name="bad_extension_error">File must be .conf or .zip</string>
+    <string name="no_configs_error">No configurations found</string>
+    <string name="invalid_config_error">Invalid config passed to %s</string>
+    <string name="multiple_tunnels_error">Only one userspace tunnel can run at a time</string>
+    <string name="horizontal_expand_error">Action labels in horizontal expand orientation is not supported.</string>
+    <string name="marker_count_error">Expected 4 markers, received %i</string>
+    <string name="exit_status_read_error">Unable to read exit status</string>
+    <string name="create_bin_dir_error">Could not create local binary directory</string>
+    <string name="create_temp_dir_error">Could not create local temporary directory</string>
+    <string name="shell_start_error">Shell failed to start: %i</string>
+    <string name="tools_unavailable_error">Required tools unavailable</string>
+    <string name="type_name_kernel_module">Kernel module</string>
+    <string name="type_name_go_userspace">Go userspace</string>
 </resources>