@fperez,
You can localize days, months, export options, etc by defining your own culture and adding it to the chart using addCultureInfo method. Please refer to the documentation for a complete list of customization available & live examples.
For chart elements such as title, subtitles, indexLabel, legendText, etc., you can pass the text(in local language) as such and it will be rendered on the chart in the same manner.
—
Shashi Ranjan
Team CanvasJS