K750i downgrade to R1CA021 and language change

[tc4oo4]

I need to do downgrade to R1CA021 (country: Estonia) and I also need estonian language.

I can't understand, which I have to choose:
1) K750_R1CA021_FS_EUROPE_5_RED49
or
2) K750_R1CA021_FS_EMEA_1_RED49


And do I have to choose some specific file system too?

[senter]

I need to do downgrade to R1CA021 (country: Estonia) and I also need estonian language.

I can't understand, which I have to choose:
1) K750_R1CA021_FS_EUROPE_5_RED49
or
2) K750_R1CA021_FS_EMEA_1_RED49


And do I have to choose some specific file system too?

Use these files:

1. K750_R1DB001_MAIN_EU_1_CL_RED49
2. K750_R1DB001_FS_EMEA_1_RED49
3. K750i_CDA102337_1_R5A_Generic_EMEA_1