# Language Setting #### Purpose The `lang` setting lets you declare the language of your slide deck to assist search engines and browsers. #### Syntax ```yaml lang : "es" ``` ### Details ?> Settings are activated using the [PITCHME.yaml](/conventions/pitchme-yaml.md) for your slide deck. When activated, this setting sets the lang property on the top-level `` element for your slide deck. By default, this property is not set.