@CRob,
CRob wrote:someone told me that I needed to use leads after Spanish because otherwise it negates having multiple leads (in reference to the English leads).
No. 57 leads are a plural quantity; 1 is singular. you would never write "1 leads". However, fluent native speakers are likely to avoid the "leads... lead" repetition by omitting the second "lead":
Currently we have 57 English leads and 1 Spanish in the task tracker. ("Lead" is implied after "Spanish".)
Currently I have three red cars and one blue. ("Car" is implied after "blue".)
... or by doing this:
Currently we have 58 leads in the task tracker: 57 English and 1 Spanish.
Currently I have four cars: three red and one blue.
It is better to write numbers, amounts, etc in words in prose - three cars, ten tons, six years.