From dcec107d05fe8dd86f7e02e47969608873cd7bea Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Tue, 8 Nov 2022 08:47:31 +0100
Subject: [PATCH] LT: use system language as mother tongue

---
 .../java/eu/faircode/email/LanguageTool.java  | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/app/src/main/java/eu/faircode/email/LanguageTool.java b/app/src/main/java/eu/faircode/email/LanguageTool.java
index f106d36265..04860ebd9e 100644
--- a/app/src/main/java/eu/faircode/email/LanguageTool.java
+++ b/app/src/main/java/eu/faircode/email/LanguageTool.java
@@ -21,6 +21,7 @@ package eu.faircode.email;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.content.res.Resources;
 import android.net.Uri;
 import android.os.Build;
 import android.os.LocaleList;
@@ -110,6 +111,24 @@ public class LanguageTool {
         if (code.size() > 0)
             builder.appendQueryParameter("preferredVariants", TextUtils.join(",", code));
 
+        String motherTongue = null;
+        String slocale = Resources.getSystem().getConfiguration().locale.toLanguageTag();
+        for (int i = 0; i < jlanguages.length(); i++) {
+            JSONObject jlanguage = jlanguages.getJSONObject(i);
+            String c = jlanguage.optString("longCode");
+            if (TextUtils.isEmpty(c))
+                continue;
+            if (slocale.equals(c)) {
+                motherTongue = c;
+                break;
+            }
+            if (slocale.split("-")[0].equals(c))
+                motherTongue = c;
+        }
+
+        if (motherTongue != null)
+            builder.appendQueryParameter("motherTongue", motherTongue);
+
         if (lt_picky)
             builder.appendQueryParameter("level", "picky");