What is AltLang?

AltLang is an automatic language variety converter that will help you deliver content into different varieties of the same language, i.e. from American English into British English. It has been developed by Prompsit and it is based on Apertium MT technologies. Its conversions are completely reliable and will make your content be not just in the right language but also in the right variant of your clients’ language.

The language variants available through AltLang are:
  • European Spanish ⇆& Spanish Latin America (es_ES - es_LA)
  • British English ⇆& American English (en_GB - en_US)
  • European French ⇆& Canadian French (fr_FR - fr_CA)
  • European Portuguese ⇆ Brazilian Portuguese (pt_PT- pt_BR)
AltLang is fully customisable. If you find a mistake or want to make a suggestion, please report them to

How it works with memoQ?

memoQ sends text to AltLang engine one segment at a time. The results are then displayed in the translation results and the translator can decide whether or not to use it.

What do you do if you want to use this service?

If you want to use AltLang inside memoQ please contact us at to get a username and a key. You will need them when enabling the plugin in Options | Machine translation in memoQ.