Display text with two language in webpage with different fonts with font-face at rule in css

My web page displays Persian text using the Yekan font as expected. Why does the English text incorrectly use a font other than Alger?

@font-face { <!-- Persian Font -->
        font-family: Yekan;
        src: url(Fonts/BYekan.ttf);
        unicode-range:U+0600-06FF;
    }
    @font-face { <!-- English Font -->
        font-family: Alger;
        src: url(Fonts/ALGER.TTF);
        unicode-range: U+0020-007F;
    }