You can insert as many descriptions for an 'other cost' attached to an order as you want.
<POH_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 object is not processed; that is, neither inserted nor modified. ‘N’ is not required for the language-dependent descriptions, only for orders, line items, and other costs.
<POH_OC_NLS_ID>
Mandatory.
Allowable values: All languages defined on A.10.01 Languages.
<POH_OC_SHORT_DESC>
Mandatory.
Language-dependent short description for an "other cost" attached to an order.
<POH_OC_DESCRIPTION>
Mandatory.
Language-dependent description for an "other cost" attached to an order.