New languages:
* Czech (Česky [CZ])
* English [GB], thanks to Pat2309

Compatible with ContactForm

New languages:, thanks to Pat2309
* Thai (ภาษาไทย [TH])

Checked compatibility with Piwigo 2.7

New languages:
* Finnish (Finnish [FI]), thanks to lrd
* Serbian (Српски [SR]), thanks to gpopac
* Swedish (Svenska [SE]), thanks to Blytung

Ability to configure $conf['stop_spammers_sfs_threshold'] in local configuration. sfs = stopforumspam.com. By default, set to 50. Reduce it if you want to catch more spammers.

Checked compatibility with Piwigo 2.6

New languages:
* Bulgarian (Български [BG]), thanks to turnokopa
* Catalan (Català [CA]), thanks to AlbertParera
* Danish (Dansk [DK]), thanks to Kaare
* German (Deutsch [DE]), thanks to Yogie
* Greek (Ελληνικά [GR]), thanks to bas_alba
* Esperanto (Esperanto [EO]), thanks to sylvbarrier
* Spanish (Español [ES]), thanks to jpr928
* Persian (فارسی [IR]), thanks to Garcia
* Italian (Italiano [IT]), thanks to Ericnet
* Latvian (Latviešu [LV]), thanks to agrisans
* Norwegian (Norsk bokmål [NO]), thanks to abbamust
* Dutch (Nederlands [NL]), thanks to eijdenberg
* Polish (Polski [PL]), thanks to K.S.
* Portuguese Brazil (Brasil [BR]), thanks to flaviove
* Portuguese (Português [PT]), thanks to ANO
* Russian (Русский [RU]), thanks to Konve
* Slovak (Slovensky [SK]), thanks to dodo
* Slovenian (Slovenščina [SL]), thanks to MarkoAm
* Turkish (Türkçe [TR]), thanks to LazBoy
* Ukrainian (Українська [UA]), thanks to animan
* Chinese (中文 (简体) [CN]), thanks to winson
* Hong-Kong (中文 (香港) [HK]), thanks to hkdigit
* Traditional Chinese (中文 (繁體) [TW]), thanks to azq1231

First version (but already works really well ;-)