Trans fixes

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |  #11630
| License       | MIT

### Version: master. At: 2293556

#### Directory:
https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Form/Resources/translations

##### File name root: validators
###### Source diffs between English and locale

Locale  | Message ids
------- | ----------------------------------------------------------
[eu](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Form/Resources/translations/validators.eu.xlf) | 30 
[fi](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Form/Resources/translations/validators.fi.xlf) | 28 
[he](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Form/Resources/translations/validators.he.xlf) | 30 
[ja](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Form/Resources/translations/validators.ja.xlf) | 30 
[nb](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Form/Resources/translations/validators.nb.xlf) | 30 
[sv](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Form/Resources/translations/validators.sv.xlf) | 30 

#### Directory:
https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations

##### File name root: validators
###### Source diffs between English and locale

Locale  | Message ids
------- | ----------------------------------------------------------
[et](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.et.xlf) | 48 54 55 56 
[hy](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.hy.xlf) | 36 37 38 39 40 
[ja](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.ja.xlf) | 47 
[lt](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.lt.xlf) | 36 37 38 39 40 
[mn](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.mn.xlf) | 9  36 37 38 39 
[nl](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.nl.xlf) | 68 72 
[ru](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.ru.xlf) | 36 37 38 39 40 
[th](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.th.xlf) | 47 
[zh_CN](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.zh_CN.xlf) | 36 37 38 39 40 
[zh_TW](https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Validator/Resources/translations/validators.zh_TW.xlf) | 36 37 38 39 40

Message used by constraints but not found in translation file

Class | Message
----- | ----------------------------------------------------------
Collection | This field was not expected.
Collection | This field is missing.
Agreed, I'll not touch them anymore. 

However then we cannot (completly) fix #11630 fix (because of breaking BC).
The message in the Constraint is the key (and cannot be changed for BC), but also acts default translation when not using the translator.
So when we change the source in the translation files from 'The fields {{ fields }} were not expected.' to 'This field was not expected.' the translations work (agian) when using the translator.
If you do not use the translator the `fields` will not be inserted in the message.