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post_title: String localization guidelines
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1. Use `woocommerce` textdomain in all strings.
2. When using dynamic strings in printf/sprintf, if you are replacing > 1 string use numbered args. e.g. `Test %s string %s.` would be `Test %1$s string %2$s.`
3. Use sentence case. e.g. `Some Thing` should be `Some thing`.
4. Avoid HTML. If needed, insert the HTML using sprintf.

For more information, see WP core document [i18n for WordPress Developers](https://codex.wordpress.org/I18n_for_WordPress_Developers).