You say in english

The French drinks a lot of wine.
The Swiss makes good choloclate.

Is there a national adjective without "the"??

You've used those nationalities as nouns.

We might say

Swiss trains are on time.

French wine is the best in the world.

I found the rule that national adjectives end with -ese; -ch; -sh; -ss goes with the, it's in my grammar book that way, and now I'm lconfused wether there are some without the.

Be sure you know the difference between nouns and adjectives.

Your examples are nouns (The French drink a lot of wine.)

My examples show the same words used as adjectives.

Yes, there is a national adjective that can be used without "the." Most national adjectives, which describe the origin or nationality of a person or thing, typically require the definite article "the." However, there are some exceptions, such as when the national adjective ends in a vowel sound. For example:

- "He is French." (The French) vs. "She is American." (No article)
- "I love Italian food." (The Italians) vs. "He speaks Spanish." (No article)
- "She is Irish." (The Irish) vs. "They are Canadian." (No article)

So, while it is common to use the definite article "the" with national adjectives, there are cases where it is omitted, especially when the adjective ends in a vowel sound.