Following update, translation coverage still patchy

[Michael Bauer]

Decided to wait for an update, just in case. So last night I updated to 
15.04 (OTA-9.1) on my Aquaris E4.5. Apart from some FP (at least they 
look like FP), 15.4 should be fully localized 
(http://projects.davidplanella.org/stats/vivid/gd).

Just one example, the Settings in the default browser give me
Co-roinn
Comharran-lìn
Eachdraidh
Find in page
Downloads
Private Mode
Settings

But all these, for example Private Mode, had been localized as of Sept 
2015 (http://bit.ly/1RuYHTS).

Does this mean translations take more than what, 5 months to filter 
through to devices not running some form of nightly build?

Cheers,

Michael

PS don't get me wrong, it's a really cool phone & OS, just puzzled by 
the patch translation coverage!