Biriktirilmi
Biriktirilmi is not a standard entry in Turkish dictionaries. In standard Turkish, the verb biriktirmek means to accumulate or collect, and its common passive and participial forms are biriktirilmek (to be accumulated) and biriktirilmiş (has been accumulated). The interrogative form of a past passive would typically be biriktirildi mi? and not biriktirilmi. As a result, biriktirilmi is generally regarded as nonstandard, a typographical error, or a dialectal/nonstandard variant rather than a recognized dictionary form.
Linguistic analysis suggests that if biriktirilmi appears in a text, it most likely arises from a misapplication
Usage notes for writers and editors: if you encounter biriktirilmi, replace it with biriktirilmiş mi? or biriktirildi
See also: Turkish grammar, Turkish verb suffixes, passive voice in Turkish, question particles (mi).