update ui lang support...

app.py

@@ -94,14 +94,14 @@ translations = load_ui_language()
 
 def language_selection_page():
     """Page de sélection de la langue."""
-    st.title("Sélection de la langue")
+    st.title(f"{get_translation('selection_de_la_langue')}")
     selected_language = st.selectbox(
-        "Choisissez la langue de l'interface",
+        f"{get_translation('choix_selection_langue')}",
         options=list(translations.keys()),
         index=list(translations.keys()).index("English"),
         format_func=lambda lang: f"{LANGUAGES_EMOJI.get(lang, '')} {lang}"
     )
-    if st.button("Confirmer"):
+    if st.button(f"{get_translation('continuer')}"):
         st.session_state.interface_language_select = selected_language
         st.switch_page("pages/main.py")