<p>The packages included in Tails are carefully tested for security. Installing additional packages might break the security built in Tails. For example, installing OpenVPN might modify the firewall rules that Tails uses to force network traffic to go through Tor. So, be careful with what you install.</p>
Replace <span class="command-placeholder">lang</span> with the code for your language. For example, <span class="command">es</span> for Spanish or <span class="command">de</span> for German`vi` for Vietnamese.
Tails already includes language packages and dictionaries for Arabic, German, Spanish, Farsi, French, Hindi, Bahasa Indonesia, Italian, Portuguese, Russian, Turkish, and Simplified Chinese.
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for <span class="application">LibreOffice</span>: <span class="command"*LibreOffice* language package: <code>libreoffice-l10n-<span class="command-placeholder">lang</span></spancode>
[List of available *LibreOffice* language packages](https://packages.debian.org/search?keywords=libreoffice-l10n&searchon=names&suite=stable§ion=all)
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for <span class="application">Thunderbird</span>: <span class="command"*Thunderbird* language package: <code>thunderbird-l10n-<span class="command-placeholder">lang</span></spancode>
[List of available *Thunderbird* language packages](https://packages.debian.org/search?keywords=thunderbird-l10n&searchon=names&suite=stable§ion=all)