.en{
    color:#fff;
}
.es{
    color:#fff;
}
.check{
    position:relative;
    width: 50px;
}
.check:before{
    content:'';
    position:absolute;
    width: 50px;
    height: 25px;
    background: #333;
    border-radius: 25px;
}
.check:after{
    content:'';
    position:absolute;
    width: 25px;
    height: 25px;
    background: #fff;
    border-radius: 25px;
    transition: 0.25s;
    border: 2px solid #333;
    box-sizing: border-box;
}

.check:checked:after{
    left: 25px;
    border: 2px solid #333;
}
.check:checked::before{
    background: #333;;
}