Improve diacritic searching in Sierra to include Semitic languages, especially Arabic! We have a fair number of Arabic books in out collections, and a large Arabic community, but Sierra support for Arabic characters does not seem complete. We often find that Arabic letters in Sierra is replaced by a white square, which seems to mean that the character is not supported. The names appear fine in Vega but the non supported letters do not seem to be indexed in the search results. This is an important language for members of our community and support for it is important in our library.