Daily practice of english langage

Daily practice of english langageEnglish Practice

This is a more succinct title. If you wanted to keep your original title, correcting it would have been: "Daily Practice of the English Language" However, this sounds extremely formal, like the title of an academic book about English.

Today, I have practiced some English.

I have learned how to write the nationalities in English.

How to write nationalities in general => no need for "the"

This class warwas about the nationalities, adjectives and the in noun of the nationalitiesand adjective forms.

A bit clearer this way

Even if I knew a few, I didn't knewknow all the rules.

So, in definitiveoverall, Itit was a good thing to practice.

"In definitive" isn't a phrase we would use. I gave one potential natural substitute

Daily practice of english langageEnglish Practice

"language" is misspelled. I removed it because "English" already means that. I capitalized "practice" because it's part of the title.

Today, I have practiced some English.

I (have) learned how to write the nationalities in English.

"I learned" if it completed in the past.

This class warlesson was about the nationalitiesnationality adjectives and the noun of the nationalitiesnationality nouns.

Even ifthough I (already) knew a few of them, I didn't knewknow all the rules.

So, in definitive, Itdefinitely it was a good thing to practice.