How do i use ご particle properly?

how do i use ご particle properly? such as in ロシアご it makes it mean russian language, is this the only time i would use it?

ご is usually just attached to the name of a country, but with the kanji 語 which means language or word.

日本語 にほんご Japanese language
中国語 ちゅうごくご Chinese language
英語 えいご English language
イタリア語 Italian language
ドイツ語 German language
フランス語 French language

It also appears in the word 言語 (げんご), which means language.
I hope that helps you.

In these uses, by the way, it is not a particle.