> German is a language where in the written form you look at the letters and you immediately see how it is spoken.
Lol, written vs spoken German is just as ambigious as any other language with too few letters in the alphabet. Just look at "ich" vs "ach" (and then of course there's dozens of local dialects that don't even have spelling rules and would need even bigger alphabets if "done right").
No, not all languages are the same about the correlation of spelling and pronunciation. Of European languages, English is the least predictable, Spanish is the most predictable, and German is (about equidistant) between them. Spanish had a spelling reform the shortest time ago, English never had one.
Source: Read it somewhere a long time ago, sorry.
"You speak what you see" does not mean that every letter or combination of consonants is pronounced the same, but that there are clear rules that determine how every thing is spoken (with exceptions being rare). The fact that "ch" is pronounced differently depending on the vowel before is a consistent rule. In contrast in languages like english you do not have consistent rules like that for a big part of the language, to the extent that a native speaker encountering a new word (eg a street or town name) may not know how to speak or write it.