Cash Flow Statement
Annual Balance Breakdown - Detailed
Annual Expense Breakdown – Detailed

The months and the string ‘Account’ in the header row will not translate; the following fix works:-
File: modules\rep_cash_flow_statement\reporting\rep_cash_flow_statement.php
change

251:     $headers2[0] = 'Account'; 

to

251:     $headers2[0] = _('Account'); 

And to translate the months
In the same file: modules\rep_cash_flow_statement\reporting\rep_cash_flow_statement.php
change

260:             $headers2[] = substr($header_row[$i], 0, $wrap_point); 

to

260:             $headers2[] = _(substr($header_row[$i], 0, $wrap_point)); 

File: modules\rep_annual_expense_breakdown\reporting\rep_annual_expense_breakdown.php
Lines 275 & 284 respectively

File: modules\rep_annual_balance_breakdown\reporting\rep_annual_balance_breakdown.php
Lines 273 & 282 respectively