Help with international transcripts

Hi,
I’m international student, expecting to graduate IB in 2022, and I’ve just started exploring common app. From what I understand, counselor sends/ adds transcripts.
What about transcripts written in languages other than English:

  • do they have to be officially translated and evaluated? My counselor is IB teacher and therefore is fluent in English, can she do it instead?
    *high school in my country lasts 3 years: should I add grades from grade 9, even though it was in junior high school?
  • if using a specific agency to evaluate my transcripts is necessary: can you recommend such agency to me? Should I transcript grade 9 and 10, or only 10?
    I’d be really grateful for any help::