Minor typo repaired

Changed "the text of the brand of false" into "the text of the brand or false"

Fix phpdoc

it's not a function parameter

update example to use navbar-nav class

if you try to render the nav without this class it renders each item on its own line.  this change means they are rendered inline as expected.

docs/guide-ja updated [ci skip]

docs/guide small fixes [ci skip]

Update guide-es [skip ci]

docs/guide-ja/usage-widgets.md updated [ci skip]

docs/guide/usage-widgets.md revised for readability [ci skip]

Update guide-es  [skip ci]

improving translation

improving translation

Add guide-es [skip ci]

`yii\bootstrap\Html` helper added