Can't translate TAXES

Hi, I must be getting crazy. Been busy with this problem for a few hours.

I'm setting up a shop. Languages will be Dutch and English. Problem is with the taxes. In Dutch it's 'BTW', in English it's 'VAT'.
At checkout, at the last page (cart status, cart without edit) I see BTW in Dutch, but also in English.
I have looked in views-checkout-cart, it looks like I need TAXES.
Looked in the language files. In Dutch it's TAXES="BTW" and in English it's TAXES="VAT".
But it still shows BTW in the English front-end.
I searched through the langauge file, the word BTW is not there at all.
I looked to language management in Joomla, nothing to see.
I checked all Falang, nothing there.

nicolas wrote: Hi,

The name of the taxes come from the name of your tax rate (menu System>Taxes and then button "manage rates"). So it's normal that you see the same text regardless of the language.
If you don't want that and that you want to display the generic translation, turn off the "display detailed taxes" option of the configuration and it will use the translation key.

<tr>
<td class="key"> BTW naamsleutel </td>
<td>
VAT
<input type="hidden" value="VAT" name="data[tax][tax_namekey]">
</td>
</tr>
<tr>
<td class="key"> Tarief </td>
<td>
<input type="text" value="21" name="data[tax][tax_rate]">
%
</td>
</tr>

Oh I see, I need to first create a BTW name key, then edit the btw category and there chose from the the BTW name key.