> Both are gathered from the launcher

Do all 4 games have a unified installer?

Generally in collections like this. Version numbers and languages are listed in contents rather than the field. From what i can see to here, OG mount and blade had separate language depots for German, Polish and Chinese neither of which are present. So wouldn't trust the launcher in the case of that one at least. And the Napoleonic DLC doesn't actually have an official Czech translation. Only the base game.

In short. Do it like this instead.

Contents:
Mount & Blade Version xxx (Languages, other language)
Mount & Blade: Ateş ve Kılıç (Languages, other language)

I'll look at it tomorrow if I won't forget.

Do all 4 games have a unified installer?

Generally in collections like this. Version numbers and languages are listed in contents rather than the field. From what i can see to here, OG mount and blade had separate language depots for German, Polish and Chinese neither of which are present. So wouldn't trust the launcher in the case of that one at least. And the Napoleonic DLC doesn't actually have an official Czech translation. Only the base game.

In short. Do it like this instead.

Contents:
Mount & Blade Version xxx (Languages, other language)
Mount & Blade: Ateş ve Kılıç (Languages, other language)

Disc 1
http://redump.org/disc/85597

Common Disc Info:
        (...)
        Languages: Chinese, Czech, English, French, German, Hungarian, Spanish, Polish, Turkish

        Ringcode Information:

Data Side Mastering Code (laser branded/etched): KAMEL<TAB>DVD 517658  MOUNT AND BLADE-WARBAND NAPOLYON-DISK  18.04.2012 15:42:19
Data Side Mastering SID Code: IFPI LW65
Data Side Mould SID Code: IFPI ABZ39
Label Side Mould SID Code: IFPI ABZ38

        (...)
        Comments:
(...)
<b>Internal Name</b>: Mount&&Blade Koleksiyon Paketi
(...)
Dialects: zh_CN, zh_TW

        Contents:
Mount & Blade: Warband
Mount & Blade: Warband - Napoleon Savaşları

Steam Depots:
Mount Blade Warband [48701]
Napoleonic Wars [48705]

Version and Editions:
        Version: 1.150
        (...)

Copy Protection: Steam (.sis/.sim/.sid)

Disc 2
http://redump.org/disc/85598

Common Disc Info:
        (...)
        Languages: English, French, German, Spanish, Turkish

        Ringcode Information:

Data Side Mastering Code (laser branded/etched): KAMEL<TAB>DVD 517659  TIGLON-MOUNT AND BLADE-ATES VE KILIC-DISK 2  18.04.2012 16:18:32
Data Side Mastering SID Code: IFPI LW65
Data Side Mould SID Code: IFPI ABZ39
Label Side Mould SID Code: IFPI ABZ38

        (...)
        Comments:
(...)
<b>Internal Name</b>: Mount&&Blade, Mount&&Blade: Ateş ve Kılıç
(...)

        Contents:
Mount & Blade
Mount & Blade: Ateş ve Kılıç

Steam Depots:
mount and blade content [22101]
Mount&Blade With Fire and Sword Depot [48721]

Version and Editions:
        Version: 1.011, 1.143
        (...)

Copy Protection: Steam (.sis/.sim/.sid)

Scans:

Disc 1:
Front: https://www.betaarchive.com/db/a2/a293a … disc01.jpg
Back: https://www.betaarchive.com/db/a2/a293a … 1_rear.jpg

Disc 2:
Front: https://www.betaarchive.com/db/a2/a293a … disc02.jpg
Back: https://www.betaarchive.com/db/a2/a293a … 2_rear.jpg

Changes:
Added version information and proper, complete languages for both discs. Both are gathered from the launcher.
I wrote ringcodes wrong in my initial submission, but I guess they are correct in the database. I have corrected myself anyways.
Remove " # from setup.ini" at the end of the Internal Name line. It was meant to be a mod note, it also looks poor in entries in my opinion.
Steam depots are added, with their names gathered from SteamDB.
Copy Protection of "Steam" is extended to include file types.
Notice that two version values are added to Disc 2. This is because it includes two games, where each one has different version.
Steam appID of 48705 is also added as depot for Disc 1 because it's included in both ""apps"" and ""depots"" section of .sis file. It doesn't have a separate version because it gets added as "scenario" to the main game, which is selectable on the launcher before launching the game.
Scans are from my BetaArchive submission. These are not the highest quality scans, though highest quality scans can be download with an account that has Archive Access.