On
https://pt.wikipedia.org/wiki/Special:ContentTranslation?page=Rational+root+theorem&from=en&to=pt&targettitle=Teorema+das+ra%C3%ADzes+racionais
if I click in the field on the right of 'Weisstein, Eric W. "Rational Zero Theorem". MathWorld.', in the section for "External links", I get the following error in the console (and the content is not inserted for translation:
TypeError: mwData.parts[0].template is undefined[Learn More] load.php:99:1087 Template.prototype.init https://pt.wikipedia.org/w/load.php:99:1087 Template https://pt.wikipedia.org/w/load.php:99:593 TemplateTool.static.processTemplate https://pt.wikipedia.org/w/load.php:117:412 TemplateTool.static.processBlockTemplate https://pt.wikipedia.org/w/load.php:119:387 jQuery.Callbacks/fire https://pt.wikipedia.org/w/load.php:45:104 jQuery.Callbacks/self.fireWith https://pt.wikipedia.org/w/load.php:46:431 mw.hook/<.fire https://pt.wikipedia.org/w/load.php:176:216 sectionClick https://pt.wikipedia.org/w/load.php:59:711 jQuery.event.dispatch https://pt.wikipedia.org/w/load.php:65:913 jQuery.event.add/elemData.handle
In the original article, this is the content of that line:
*{{MathWorld|urlname=RationalZeroTheorem|title=Rational Zero Theorem}}