German · Pronunciation Guide
SHPREKH-n. At the start of a word, sp is always 'shp', and this ch is the soft one because it follows a front vowel.
Weight goes on SPRE-, but this verb belongs to the class that changes its stem vowel in the du and er forms: sprichst and spricht have a short i where the infinitive has e. The stress never budges from that first syllable, so the shift is purely one of vowel quality, not rhythm.
Listen: sprechen
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Listen: Sprichst du Deutsch?
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Sprichst du Deutsch? shows the changed vowel and then piles three consonant sounds onto the end of the verb — ch, s, t — with no vowel to help. Deutsch itself finishes on the ch of church, so the question contains two completely different sounds both spelled with ch, one soft and one an affricate.
Two errors typically arrive together. The sp gets pronounced as written, giving 'sprek-en', and the ch gets replaced by a k. Fix the sh first, since it is mechanical and rule-based; then work on the soft ch, which follows e here and so needs the front-of-mouth hiss rather than the throaty scrape learners often default to after meeting machen.