[Here](https://github.com/odoo/odoo/blob/a277faa2ffab7559fcbad95fcc1e8fd6a26d756b/odoo/tools/translate.py#L1645) If 'en_US' is exist in new_values then as a default language 'en_US' translations are loading due to that translation of default language gone lost
OPW -3482255
original translation look like this

if default language is dutch for example then instead of dutch language english's translations are there
```
en_US : <t t-name="website.test">
<t t-call="website.layout">
<p class="o_default_snippet_text">I transalted to english</p>
</t>
</t>
fr_BE : <t t-name="website.test">
<t t-call="website.layout">
<p class="o_default_snippet_text">this french</p>
</t>
</t>
nl_NL : <t t-name="website.test">
<t t-call="website.layout">
<p class="o_default_snippet_text">I transalted to english</p>
</t>
</t>
```
arch_db look like this
```
en_US : <t t-name="website.test">
<t t-call="website.layout">
<p class="o_default_snippet_text">I transalted to english</p>
</t>
</t>
fr_BE : <t t-name="website.test">
<t t-call="website.layout">
<p class="o_default_snippet_text">this french</p>
</t>
</t>
nl_NL : <t t-name="website.test">
<t t-call="website.layout">
<p class="o_default_snippet_text">this dutch</p>
</t>
</t>
```
closesodoo/odoo#139111
X-original-commit: 542851c50182f32327f9cd3607081515899ddb76
Signed-off-by: Raphael Collet <rco@odoo.com>
Signed-off-by: Sanchit Gupta (sagu) <sagu@odoo.com>