R: google translate API (packages 'translate' & ''translateR')
<p>I am trying to use the <code>translate</code> and <code>translateR</code> packages with R-Studio.</p>

<p>I have created both a 'server' and 'browser' API key. The browser API works fine when running the example:</p>

<p><a href="https://www.googleapis.com/language/translate/v2?key=YOUR_API_KEY&amp;q=hello%20world&amp;source=en&amp;target=de" rel="nofollow">https://www.googleapis.com/language/translate/v2?key=YOUR_API_KEY&amp;q=hello%20world&amp;source=en&amp;target=de</a></p>

<p>However, when using either API key and either package with R-Studio (<code>translate</code>/<code>translateR</code>), I obtain an error message. With <code>translate</code></p>

<pre><code>&gt; library(translate)
&gt; set.key("mykey")
&gt; translate('Hello, world!', 'en', 'de')
Error in function (type, msg, asError = TRUE)  : 
  SSL certificate problem: unable to get local issuer certificate
</code></pre>

<p>What might be the issue? Thanks for help!</p>