At least in the USA all of you flight time would be recognized.
For completion in the US you would need to
- pass a IFR written exam
- training as required to pass the FAA IR practical test
- pass a CPL written exam
- training as required to pass the FAA CPL exam
- training as required to pass the CPL practical ME and SE
- take either a residential ATPL course or a distance learning ATPL course (both can be done in the US) and pass all European ATPL written exams.
Then you can follow up with practical conversion in Europe.