Hello,
If we let the url title blank, EE will attempt to create url from the title.

There is the problem - strtolower doesn’t work correct with foreign characters. So that when we send the string to foreign_character_conversion function it wouldn’t work.

How I know, to do solution based on iconv() needs to make addition function (with converts charset).

Thanks for the ‘Heads up’- can you give me a good test title to try it with?  And is it throwing an error for you when it happens?

title - Tränen der Rührung und seliges Lächeln

no errors - just all no latin symbol(like ä and ü in test title)  convert to “?” and will deleted from url.

But how I understand,  my solution with mb_strtolower will helps only to people with Western Europe languages (Germany, French etc.), because after that we go to create_url_title function where make UTF-8 title encoding to ISO-8859-1. Its means that all symbol what not in this table (like Cyrillic symbol - абвгдежзиклмнопрст) will be convert to “?” and will deleted from url.

Sorry this one took a while to polish off as it involved tweaked a number of files.  We moved the lower case conversion to the regex create_url_title function (after the more verbose character conversion done there).

But you’re correct, it’s not always possible to automatically create the url title, in which case it will give an error message and allow you to manually add a url_title.  Where it is possible, the strtolower issue should be resolved for the next build.

Thanks for bringing it to our attention!