Did Richard Feynman say that anyone who claims to understand quantum physics is lying or crazy? Override or add entries to the $custom-file-text Sass variable with the relevant language tag and localized strings. Add the readonly boolean attribute on an input to prevent modification of the inputs value. You may also swap .row for .form-row, a variation of our standard grid row that overrides the default column gutters for tighter and more compact layouts. The recommended plugin to animate custom file input: bs-custom-file-input, thats what we are using currently here in our docs. This will inform users of assistive technologies that the checkboxes are related and enables native browser keyboard navigation. Add the disabled boolean attribute on an input to prevent user interactions and make it appear lighter. We currently recommend using custom validation styles, as native browser default validation messages are not consistently exposed to assistive technologies in all browsers (most notably, Chrome on desktop and mobile). If none of these are present, assistive technologies may resort to using the placeholder attribute, if present, but note that use of placeholder as a replacement for other labelling methods is not advised. Be sure to explore our custom forms to further style s initial appearance and cannot modify the