vietnamesisch
Vietnamese
Relating to the country Vietnam, its culture, its people, or its language.
Wir haben gestern in einem authentischen vietnamesischen Restaurant gegessen.
Yesterday we ate at an authentic Vietnamese restaurant.

Vietnamese
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Vietnamese
Relating to the country Vietnam, its culture, its people, or its language.
Wir haben gestern in einem authentischen vietnamesischen Restaurant gegessen.
Yesterday we ate at an authentic Vietnamese restaurant.

Adjectives for nationalities in German are often formed by adding the ending '-isch' to the name of the country. This turns 'Vietnam' into the adjective 'vietnamesisch' (Vietnamese).
Die italienische Flagge hat die Farben Grün, Weiß und Rot.
The Italian flag has the colors green, white, and red.
Adjectives derived from geographical names and ending in '-isch' are written in lowercase in German. Proper names are an exception.
Ich liebe die vietnamesische Suppe „Pho“.
I love the Vietnamese soup 'Pho'.
When the word refers to the language, it is used as a noun and capitalized. You can say 'ich spreche Vietnamesisch' (I speak Vietnamese) or 'das Vietnamesische ist eine tonale Sprache' (Vietnamese is a tonal language).
In meinem Sprachkurs lerne ich gerade Vietnamesisch.
In my language course, I'm currently learning Vietnamese.
Vietnamese man
'der Vietnamese' and 'vietnamesisch' both refer to Vietnam, but they have different grammatical functions. 'Der Vietnamese' is a noun and refers to a male person from Vietnam or with Vietnamese citizenship. 'vietnamesisch' is an adjective and describes things, people, culture, food, or language connected with Vietnam. They are easy to confuse because the forms look similar. Pay attention to the role in the sentence: a person can be 'ein Vietnamese' (a Vietnamese man); a restaurant, a dish, or a language is 'vietnamesisch' (Vietnamese).

Zum Mittagessen bestellen wir heute vietnamesische Suppe.
For lunch today, we are ordering Vietnamese soup.
Mein neuer Nachbar ist Vietnamese und erzählt gern von seiner Heimat.
My new neighbor is Vietnamese and likes to talk about his homeland.