.en{
    color: rgb(228, 101, 101);
}

.es{
    color: #00a1ff;
}

.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 #00a1ff;
}

.check:checked::before{
    background: #00a1ff;
}