The correct spelling of the plural noun is languages.
Korean.
french
Dua is performed anywhere you like. Whenever you need to make dua, just make it. You do not have to be in a clean state (wudu) it is different to prayer. There are many sites on Dua, but If you check out www.digitaldua.com you will find all the different places you can make dua with reasons. This website has Audio with the Arabic, so if you cant read Arabic you can listen and learn the dua's. The duas are from the Quran & Sunnah. Hope this helps.
Many different languages like French and German but the national language is Arabic.
100: Seratus 200: dua ratus 500: Lima ratus
english
Arabic
Dua al Hazeen, Dua al tawassul and dua al nudbeh, and there are more.
Their main language is Spanish.
French and English.
Albanian: Te dua shum. Albanian: Te dua.