long consonants

I'd want to ask if much languages distinguish long and short consonants

like if /na/ and /n:a/ would have different meanings as it would be of /na/
and /na:/


that's because I begun a language that I wanted to have only a few
consonants and vowels and to extend the possibilities the vowels and some of
the consonants have long and short phonemic realisations


For the vowels I know it is normal and found in a lot of languages but
what's about the consonants?


-Max

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