## The problem
Translating text in a language sometimes involves reordering words. Positional arguments are always inserted in the same order, which order matches English syntax, but this isn't necessarily right for every syntax of every language in the world.

Here's an eloquent example of the problem, taken from the GNU gettext documentation:
```c
printf(gettext("String '%s' has %d characters\n"), s, strlen(s));
```

which one could translate in German as follows:
```c
"%d Zeichen lang ist die Zeichenkette `%s'"
```

Even without knowing any of German, you could notice that the positions of  `%d` and `%s` have been swapped; yet printf would still insert its arguments in the same order.

That's the reason why, whenever there is more than one “format specifier” (`%s`), you should always use keyworded arguments so that the translators can freely reorder the words without any problems.

## The fix
This pull request fixes the problem by naming providing a name to the placeholders of every call to gettext with more than two placeholders.

Part of task-3869533
Community: https://github.com/odoo/odoo/pull/166014