The gemara says that we may not ask for our personal needs in Aramaic. So how can we say יקום פורקן on Shabbos? Kaddish in Aramaic is not a question because the gemara says that bi-tzibbur we may ask in Aramaic and Kaddish is only said bi-tzibbur. But what about [the first] יקום פורקן?
So queried the man Rav Ovadiah habitually called the "mofet ha-dor" - wonder of the generation, Rav Tzvi Pesach Frank [who had a very recent yahrtzeit]. See also here.