Resultado:
1. Vá ao painel do blog > Layout > Adicionar gadget
2. Escolha a opção HTML/JavaScript e, nele, cole:
<style>3. Salve.
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.google_translate img {
filter:alpha(opacity=100);
-moz-opacity: 1.0;
opacity: 1.0;
border:0;
}
.google_translate:hover img {
filter:alpha(opacity=30);
-moz-opacity: 0.30;
opacity: 0.30;
border:0;
}
.google_translatextra:hover img {
filter:alpha(opacity=0.30);
-moz-opacity: 0.30;
opacity: 0.30;
border:0;
}
</style>
<div>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="English" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Cen&hl=en'); return false;"><img alt="English" border="0" align="absbottom" title="English" height="24" src="http://4.bp.blogspot.com/_5jbh95HruKA/S1YVBORD9bI/AAAAAAAAACs/XkaL
mmin4zg/s200/United+Kingdom(Great+Britain).png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="French" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Cfr&hl=en'); return false;"><img alt="French" border="0" align="absbottom" title="French" height="24" src="http://4.bp.blogspot.com/_5jbh95HruKA/S1YVBrDZLrI/AAAAAAAAAC0/Kc6eDMT9L
FI/s200/France.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="German" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Cde&hl=en'); return false;"><img alt="German" border="0" align="absbottom" title="German" height="24" src="http://1.bp.blogspot.com/_5jbh95HruKA/S1YVBzoFF2I/AAAAAAAAAC8/WgvMK3zP1R
k/s200/Germany.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="Spain" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Ces&hl=en'); return false;"><img alt="Spain" border="0" align="absbottom" title="Spain" height="24" src="http://3.bp.blogspot.com/_5jbh95HruKA/S1YVCdHp5VI/AAAAAAAAADE/lWHzr
5znExU/s200/Spain.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="Italian" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Cit&hl=en'); return false;"><img alt="Italian" border="0" align="absbottom" title="Italian" height="24" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWqw6ZusecaCScj8xHI1EgMJai5ClKFXXoK4N6ipX0Btoi3EP2q6Wp_Vj0sIspHYDck8LFXXWnzl09OcDAla2Ez0Kf4PBuOi6Zr6Mq8g9dWXvsR5dypPxpdyq70jsgj8rSPnbG_cPniZI/s200/Italy.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="Dutch" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Cnl&hl=en'); return false;"><img alt="Dutch" border="0" align="absbottom" title="Dutch" height="24" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEja0apiwK5bYz22wZ39JXKDuwqU394u9Vg6VSn1kb46NRqcWYxZWE93LW2g1g1FjfHMOBWH8PiFVgCKEp7uJSlbemO2Gjm9Qc3JJnx8SaUQmFw5OGznWXf5YHDOAWmVHUw9vskFtf1rmg4/s200/Netherlands.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="Russian" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Cru&hl=en'); return false;"><img alt="Russian" border="0" align="absbottom" title="Russian" height="24" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQT5HamvRfMJrkUtkjfXGUhEe9IfK773TwDdwx_TKpmpJB0c8mMTfbJk3Gk6THVcXRnY9Wl0OHsEeCO8bbFIacXI4RhXuFRJiuBHffiVaWzPeroqi6-SU_B6dNOa9EmM8BkDvV-6UzBdQ/s200/Russian+Federation.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="Portuguese" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Cpt&hl=en'); return false;"><img alt="Portuguese" border="0" align="absbottom" title="Portuguese" height="24" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhIy9ow4VoMhzhzx6cZhfsbE3FiHMPrm5A4z65BglN198sYer4XWJCgbWoMwh-lb00Nk2voj_toq8E45IrtqI4sLUSKva7qpwe_8tM6M7BH8dXEyH5XaaZjRGPIA_ew2ZK_Tt5X1UKMuFc/s200/Brazil.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="Japanese" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Cja&hl=en'); return false;"><img alt="Japanese" border="0" align="absbottom" title="Japanese" height="24" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiAGN8fRlVIfFACy5VvC8A9mi4CU8b4ucizBaYUA7HyxeLY-9IW39g70MKnAtbBfn-SAQOZSGfHOGy6O07zBsXe_eFMPm3CH0d09KPvFoyfHf0Si7IaATuX4J_VPdsyXzFy4aDQvvIWi-o/s200/Japan.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="Korean" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Cko&hl=en'); return false;"><img alt="Korean" border="0" align="absbottom" title="Korean" height="24" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgvISab5VgWC5ZtTh-fYz9AEDTFz2DEQooGlzP6_pCcjLjcOrZHU-0y6w6WEpUNLCDWbtsi1VYio9qbpF-NK5gQgTHdrNwY0DFXuf0BCgMizI8Yp39nr6tRDC6aovaAeq-myogJhlj76w8/s200/South+Korea.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="Arabic" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Car&hl=en'); return false;"><img alt="Arabic" border="0" align="absbottom" title="Arabic" height="24" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDFo_P_VSu3x3qilvno4bso_2yafdnA7fk2St02NX2HaZy6BKo2moQnZZ30myb34zLm1on8qh4tsITGzZMuxYA4aIcRiCosv7hWOqzegLxPEg5ZF-6-spZEHbPP8-Fg8sTDP9cDcxOe4M/s200/Saudi+Arabia.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
<a class="google_translate" href="#" target="_blank" rel="nofollow" title="Chinese Simplified" onclick="window.open('http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&langpair=auto%7Czh-CN&hl=en'); return false;"><img alt="Chinese Simplified" border="0" align="absbottom" title="Chinese Simplified" height="24" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgl72V_-MeE-GdouxWgykjJHUqHWiVDfY1ktJHeyPzcEyNWsBtBHuz-fjrPkjy5xfhocR0OlPEsh7SD40wyPiYfEJnMtoBBpXmn6gAZNcGRHZc7SU9_s9uPPS28pQDjc4ahkWTbj2Wk_5g/s200/China.png" style="cursor: pointer;margin-right:8px" width="24"/></a>
</div>