See the section under dialectal realizations: th-alveolarization. That’s the specific pronunciation difficulty that German speakers frequently have with the English ‘th’ sound. Even native English speakers often have difficulty with the ‘th’ sound in various contexts.
https://en.m.wikipedia.org/wiki/Pronunciation_of_English_⟨th⟩
See the section under dialectal realizations: th-alveolarization. That’s the specific pronunciation difficulty that German speakers frequently have with the English ‘th’ sound. Even native English speakers often have difficulty with the ‘th’ sound in various contexts.
5z instead of 5th reform?