You can insert as many descriptions for 'other costs' attached to an order line item as you want.
<POLI_OC_NLS_PROC_TYPE>
Mandatory.
Processing type.
Allowable values: I, U, and N.
'I' means that the object is to be inserted; 'U' means that an update is to be performed. ‘N’ means that the description is not processed, that is, neither inserted nor modified. ‘N’ is not really needed for the language-dependent descriptions, only for orders, line items, and other costs.
<POLI_OC_NLS_ID>
Mandatory.
Allowable values: All languages defined on A.10.01 Languages.
<POLI_OC_SHORT_DESC>
Mandatory.
Language-dependent short description for an "other cost" attached to an order line item.
<POLI_OC_DESCRIPTION>
Mandatory.
Language-dependent description for an "other cost" attached to an order line item.