The problem is in the unicode definitions that we use to construct the tokenizer. The UnicodeData.txt entries for the upper and lower case version of that character are:
0141;LATIN CAPITAL LETTER L WITH STROKE;Lu;0;L;;;;;N;LATIN CAPITAL LETTER L SLASH;;;0142;
0142;LATIN SMALL LETTER L WITH STROKE;Ll;0;L;;;;;N;LATIN SMALL LETTER L SLASH;;0141;;0141
For other such characters used by European languages, unicode includes a mapping to the codepoints for the base character and diacritic. e.g.
013F;LATIN CAPITAL LETTER L WITH MIDDLE DOT;Lu;0;L;<compat> 004C 00B7;;;;N;;;;0140;
0140;LATIN SMALL LETTER L WITH MIDDLE DOT;Ll;0;L;<compat> 006C 00B7;;;;N;;;013F;;013F
(the base characters for these two are 004C and 006C).
You could create your own tokenizer:
[](https://sqlite.org/fts5.html#custom_tokenizers)
Dan.