There are two aspects to this.

You stay within the confines of your local board, and seek to gain merits from a restricted supply.
You can improve your English, and take advantage of the wealth of knowledge and help on the English language boards.

These options are not mutually exclusive, and many "international" members are evidence of this. I started the Fit to Talk English project to help Bitcoin Talk members take advantage of the Bitcoin economy, and the primary language for communication in that is English.