# Template previews | Developer Documentation

<div id="bkmrk-template-previewsupd">## Template previews

<div><span>Updated: Nov 4, 2025</span></div><div id="bkmrk-request-parameters"><div id="bkmrk-request-parameters-1"><div>#### Request parameters

</div></div></div><div><table><thead><tr><th><span>Placeholder </span></th><th><span>Description </span></th><th><span>Example Value </span></th></tr></thead><tbody><tr><td><div><div>`<LANGUAGE>`</div><div>*Comma-separated list*</div></div></td><td><div><div>**Optional.**</div><div>  
Comma-separated list of [language and locale codes](/books/meta-whatsapp/page/template-library-developer-documentation) of language versions you want returned.</div><div>  
If omitted, versions of all supported languages will be returned.</div></div></td><td><div><div>`en_US,es_ES`</div></div></td></tr><tr><td><div><div>`<ADD_SECURITY_RECOMMENDATION>`</div><div>*Boolean*</div></div></td><td><div><div>**Optional.**</div><div>  
Set to `true` if you want the security recommendation body string included in the response.</div><div>  
If omitted, the security recommendation string will not be included.</div></div></td><td><div><div>`true`</div></div></td></tr><tr><td><div><div>`<CODE_EXPIRATION_MINUTES>`</div><div>*Int64*</div></div></td><td><div><div>**Optional.**</div><div>  
Set to an integer if you want the code expiration footer string included in the response.</div><div>  
If omitted, the code expiration footer string will not be included.</div><div>  
Value indicates number of minutes until code expires.</div><div>Minimum `1`, maximum `90`.</div></div></td><td><div><div>`10`</div></div></td></tr><tr><td><div><div>`<BUTTON_TYPES>`</div><div>*Comma-separated list of strings*</div></div></td><td><div><div>**Required.**</div><div>  
Comma-separated list of strings indicating button type.</div><div>  
If included, the response will include the button text for each button in the response.</div><div>  
For authentication templates, this value must be `OTP`.</div></div></td><td><div><div>`OTP`</div></div></td></tr></tbody></table>

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