The alt text is read aloud when someone fills in a survey using a screen-reader. It is standard "Help"; which is slightly irritating when it is repeated with lots of wuestions.
So I want to change it to: nothing (i.e. silence), or something like "Information about this question:".

I tried changing the text Help inside the translation file, but that does not change anything.
The alt-text can be changed inside common.php.
Search for:
$line=str_replace("QUESTIONHELP", "".$help, $line);

Change the text after alt=

Save the file and that is it.
You can find common.php in the root of your limesurvey install.

However: watch out when you update. This can cause your changes disappear.

Mazi thinks it would be useful to be able to also change these text by editing the translation, what do you think?!

Any question that totals to 100% gets a graphic representation in the form of a pie chart.
I tried to change the code to make it possible to choose a bar chart instead.
I did this because the pie chart is terrible to intepret when it depicts more than 3 variables. It sure looks nice, but it does not convey information in a nice manner: it flabbergasts.
(This link tells it much better than I ever could:http://www.perceptualedge.com/articles/08-21-07.pdf)