I find that second language German types can be "Riddy cue less!" they
have the temerity to challenge 'natural English speakers'

It's not just the Germans either. Some Chinese English teachers also have the gall to challenge us!

Whilst demonstrating how a simple change of preposition can alter the meaning of a sentence completely, I was shot down in 'flames' and told I was wrong for using the following sentences.......

'I'm going to Thailand in a week'
'I'm going to Thailand for a week'

Whilst my emphasis was simply on 'in' and 'for', and how they change the meaning, according to Chinese English teachers, I'm completely wrong!

There's not a NES on this planet who would fail to understand the meaning of these two statements. Riddy cue less!