Ich auch*

The form doesn't really change in Vietnamese. If you apply either to a noun then it's taken to be adjectival. You can add the word "nước" in front ("nước" means water and is a shortening of "đất nước" = literally "land and water", used for "country").

nước Pháp or just Pháp = (the country of) France

nước Đức or just Đức = (the country of) Germany

tiếng Pháp, người Pháp = French (language), French (people, person)

tiếng Đức, người Đức= German (language), German (people, person)

The word tiếng here means language so only the language. The word itself can also mean: sound, noise or hour.