Hi Lauren ,
If you want all the titles , the alternate ones , except for one or two in between are all the Spanish version of the English titles ; they are all repeated with the addition of the text Spanish.
Couldn't you separate out the data so that you have two charts , one for the non-Spanish , and the other for the Spanish ?
If not , the smallest font size that you can select and still have readable text is 8 ; only by reducing the font size can you reduce the width of the chart.
The alternative is to have it as a bar chart , so that the titles are along the vertical axis.
Beyond this , I don't know of a third option to have all the titles showing , and a small chart size.
Narayan