Analysis of information sources in references of the Wikipedia article "فهرست زبانهای رسمی بر پایه کشور و قلمرو" in Persian language version.
In 1992, following further amendments to this directive, Latvian was established as the only زبان رسمی. It took Journal of Multilingual and Multicultural Development seven more years before the زبان کشور law was adopted in 1999, with further amendments in the years 2000, 2001 and 2002.
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