Fix bug which prevents certain languages from being loaded

https://forum.manjaro.org/t/start-work-on-a-new-welcome-screen-manjaro-hello/13685/281?u=huluti

launch.sh

@@ -5,8 +5,9 @@ rm -rf locale
 mkdir locale
 cd po
 for lang in $(ls *.po); do
-    mkdir -p ../locale/${lang::-3}/LC_MESSAGES
-    msgfmt -c -o ../locale/${lang::-3}/LC_MESSAGES/manjaro-hello.mo $lang
+    lang=${lang::-3}
+    mkdir -p ../locale/${lang//_/-}/LC_MESSAGES
+    msgfmt -c -o ../locale/${lang//_/-}/LC_MESSAGES/manjaro-hello.mo $lang.po
 done
 cd ..
 python src/manjaro_hello.py

src/manjaro_hello.py

@@ -126,6 +126,8 @@ class ManjaroHello():
         :param locale: locale to use
         :type locale: str
         """
+        if "_" in locale:
+            locale = locale.replace("_", "-")
         try:
             tr = gettext.translation(self.app, self.locale_path, [locale], fallback=True)
             tr.install()