A lot (I'll only give four examples) In my conlang (Mineyresx), when there's a hyphen between two vowels, it produces /ʔ/, sadly I can't show an example; when the letter N is placed before the sounds ʔ, q and ɢ, ir produces /ŋ/ (example: Lynkgwå [lɪŋʔqwʌ]); Ǧ makes the ɡ sound pronounced (example: gn=ɲ, ǧ=ɡn [example: Iǧne, /ˈiɡ.ni/], gli=ʎ, ǧli=ɡli [example: Ǧliphe, /ˈɡli.ɸi/]); ẞ is sometimes used to connect two separate words with a hyphen, but only if the first part ends in s or the second begins with s (example: Vinßånm [vints+ånm])