It looks like Translate Shell (which used the same path) found a new way to use it. It should easily be adaptable. So this means that they didn't close it; they just changed it....
I don't think it is new. The endpoint that this (and my) workflow used was unofficial, and the paid translation API has been around for quite a while. So, these just used a sort of backdoor that Google had left open. Now, the URL leads to a redirect captcha challenge that redirects nowhere.
It's a pity that they closed the endpoint, but we can't be too mad because it was never official to begin with.
What actually happens is that Google returns each sentence as a separate result, but the workflow throws away all but the first.
To get multi-sentence results, open the workflow in Finder and edit the translate script in it to read as follows. This will show all the sentences in a translation. Because Alfred can't show much text in its results, I've added copy text and large type. Hit CMD+C on a result to copy the translation to the clipboard and CMD+L to show the full translation in Alfred's large type window.
# Set locale and normalize unicode composition for international support.
export LC_CTYPE="UTF-8"
query="$(echo "${@:3}" | iconv -s -f UTF-8-Mac -t UTF-8)"
# Retrieve and parse Google Translate answer.
response="$(curl -G --data-urlencode "text=$query" --data 'client=p' --data 'sl=auto' --data "tl=$1" --silent --user-agent 'Mozilla/5.0' 'http://translate.google.com/translate_a/t' | python -c 'import sys, json; print("".join([d.get("trans", "<UNTRANSLATED>") for d in json.loads(sys.stdin.read())["sentences"]]).encode("utf-8"))')"
[[ -z "$response" ]] && translation="No translation found" || translation="$response"
# Write feedback.
echo '<?xml version="1.0" encoding="UTF-8"?><items>
<item uid="translation">
<title><![CDATA['"$translation"']]></title>
<arg><![CDATA['"$translation"']]></arg>
<text type="copy"><![CDATA['"$translation"']]></text>
<text type="largetype"><![CDATA['"$translation"']]></text>
<icon>icon.png</icon>
<subtitle>”'"$query"'” in '$2'.</subtitle>
</item>
</items>'