Why do you ask? You also have Öö i dunno where you from but it's a normal umlaut
ä = ae (lol ae :lol 
, ö = oe and ü = ue
other people have Ã¥ b ç d ê ï ñ õ Å¡ â€* vv ÿ and more (i've made this with an other font)
)¯´'·.,¸·`¯´·Â*<
>Â*·`¯´·¸,.·'`¯(
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tAKe cARe aND stAY oDD!