For your 2nd query you might use "anwenden", "verwenden" or "benutzen". Having said that you can also use An additional sentence in German alongside the strains of "Um eine Sprache zu lernen muss person sie sprechen" which would audio a lot less scientific. Hej jag har ont i tand långt https://f-r31864.sasugawiki.com/6425193/5_easy_facts_about_weitere_kompatible_fahrzeuge_described