"failsafe lang=us" solved the issue, no need for solution now.
I have recently downloaded "KNOPPIX_V4_2.0.2CD-2005-09-23-DE.iso" by a mistake instead of EN version.
Is there anyway/cheatcode to boot to english KNOPPIX desktop from this DE version?
(Note-I am being able to boot cd to KNOPPIX desktop but only with "Failsafe" command.)
"failsafe lang=us" solved the issue, no need for solution now.

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