Change text button sign-in page

.btn-group-lg>.btn,
.btn-lg {
color: transparent !important;
position: relative;
}

button.button.startButton.btn-lg:before {
content: 'Start';
color: #FFF;
position: absolute;
}

/* INFO */

/*target text button in English - use the css selector below to target specific language, if not used, the text will be the same in each language :lang ([language code])> Depending the text that needs to be displayed, play*/

:lang(nl)>button.button.startButton.btn-lg:before {
    content: 'Begin';
    color: #FFF;
    position:absolute;
}
/*END INFO */