All the text strings used in the ParamQuery grid can be localized to any regional langauge.
There is no support for RTL langauges (e.g. Arabic, Hebrew) currently.
One need to look at the pager of grid to see the effect of change in Locale.
Localized strings reside in $.paramquery.pqPager.regional[locale] and $.paramquery.pqGrid.regional[locale] where locale can be 'en', 'es', 'zh', 'ja', etc.
English is the default locale and translations are available for below languages. More translations are welcome.
One can easily support another language by adding one js file per language and formatting it similar to Spanish js file.