I've tried this.I downloaded fifa 2010 world cup xbox 360 pal iso and put connected with eng_us files to my Game\ path as your told.
My rna.ini parameters;
[LOCALE]
USE_LANGUAGE_SELECT = 1
PUBLISHING_REGION = EU
DEFAULT_LANGUAGE = eng,us
AVAILABLE_LANG_1 = eng,us
AVAILABLE_LANG_2 = fre,fr
AVAILABLE_LANG_3 = ita,it
AVAILABLE_LANG_4 = ger,de
AVAILABLE_LANG_5 = spa,es
AVAILABLE_LANG_6 = cze,cz
AVAILABLE_LANG_7 = hun,hu
AVAILABLE_LANG_8 = pol,pl
AVAILABLE_LANG_9 = rus,ru
AVAILABLE_COMMENTARY_LANG_1 = eng,us
SLUS = EA203101A0X11
or
[LOCALE]
SKU=EU_EnFrDeItNl
USE_LANGUAGE_SELECT = 1
PUBLISHING_REGION = EU
DEFAULT_LANGUAGE = eng,us
AVAILABLE_LANG_1 = eng,us
AVAILABLE_LANG_2 = fre,fr
AVAILABLE_LANG_3 = ger,de
AVAILABLE_LANG_4 = ita,it
AVAILABLE_LANG_5 = dut,nl
AVAILABLE_COMMENTARY_LANG_1 = eng,us
AVAILABLE_COMMENTARY_LANG_2 = fre,fr
AVAILABLE_COMMENTARY_LANG_3 = ger,de
AVAILABLE_COMMENTARY_LANG_4 = ita,it
AVAILABLE_COMMENTARY_LANG_5 = dut,nl
SLUS = EA203101A0X11
but commentary has no speaking.Only spoken in a foul possesion.Just one time, in the red card possesion.
Sometimes game has crashed.