Given a sentence in Igbo language, translate the sentence to English language keeping the meaning of the original sentence intact

Igbo sentence: ISO 639 Language codes bụ n'ihi ihe yiri aha ndị na-asụ asụsụ.
ISO 639 Language codes are for the representation of names of languages.

Igbo sentence: Ndụ ya malitere mgbe a nwoke na nwanyị zutere, nwere a nwa tupu ha lụrụ di, ma nye ya maka nkuchi.
His life began when a man and woman met, had a child before they got married, and gave him up for adoption.

Igbo sentence: Research on òké gosiri na mma ebe nchekwa njigide na-echeta, karịsịa na okwu nke ule.

Research on rodents have indicated improved memory retention and recall, especially in terms of testing .